<div class="side-search">
    <form class="form" method="post">
        <div class="layui-inline">
            <input class="layui-input" type="text" placeholder="请输入关键词">
        </div>
        <div class="layui-inline">
            <button class="layui-btn layui-btn-sm layui-btn-primary">
                <i class="layui-icon layui-icon-search"></i>
            </button>
        </div>
    </form>
</div>